Servants of the Skull

Published in the 11/1934 issue of Secret Agent X.
"From the macabre maze of a labyrinthian world, the Skull, master of murder, reached out and destroyed the brains of mighty financiers. Money kings were his meat. And the law could not protect them... Only one man could match brains with the sinister Skull—and that man was Secret Agent "X." But the Skull did not fear "X." For "X"—the Man of a Thousand Faces, a thousand personalities, a thousand tricks—had one vulnerable spot. And the Skull knew where it lay."